// Copyright (c) 2023 Huawei Technologies Co., Ltd
// Copyright (c) 2019, Facebook CORPORATION.
// All rights reserved.
//
// Licensed under the BSD 3-Clause License  (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "op_plugin/AclOpsInterface.h"
#include "op_plugin/OpApiInterface.h"
#include "op_plugin/utils/op_api_common.h"

namespace op_api {
using npu_preparation = at_npu::native::OpPreparation;

at::Tensor& binary_cross_entropy_backward_out_npu_nocheck(at::Tensor& grad_input, const at::Tensor& grad_output,
                                                          const at::Tensor& self, const at::Tensor& target,
                                                          const c10::optional<at::Tensor>& weight_opt,
                                                          int64_t reduction) {
  EXEC_NPU_CMD(aclnnBinaryCrossEntropyBackward, grad_output, self, target, weight_opt, reduction, grad_input);
  return grad_input;
}

at::Tensor& binary_cross_entropy_backward_out(const at::Tensor& grad_output, const at::Tensor& self,
                                              const at::Tensor& target, const c10::optional<at::Tensor>& weight_opt,
                                              int64_t reduction, at::Tensor& grad_input) {
  DO_COMPATIBILITY(aclnnBinaryCrossEntropyBackward, acl_op::binary_cross_entropy_backward_out(
                                                        grad_output, self, target, weight_opt, reduction, grad_input));
  binary_cross_entropy_backward_out_npu_nocheck(grad_input, grad_output, self, target, weight_opt, reduction);
  return grad_input;
}

at::Tensor binary_cross_entropy_backward(const at::Tensor& grad_output, const at::Tensor& self,
                                         const at::Tensor& target, const c10::optional<at::Tensor>& weight_opt,
                                         int64_t reduction) {
  DO_COMPATIBILITY(aclnnBinaryCrossEntropyBackward,
                   acl_op::binary_cross_entropy_backward(grad_output, self, target, weight_opt, reduction));
  at::Tensor grad_input = npu_preparation::apply_tensor_without_format(self);
  // calculate the output result of the NPU
  binary_cross_entropy_backward_out_npu_nocheck(grad_input, grad_output, self, target, weight_opt, reduction);
  return grad_input;
}
}  // namespace op_api
